{
  "summary": "Avatar cropping works as intended now",
  "dedicated_hours": 4
}
- Crops a perfect circle
- Shows proper preview

Issues:
- JS shows above header elements, of which the left panel is part of, to fix this z-index would be used;
- To fix it the position property cannot be fixed, which would break the design, of course it needs to be fixed and will as soon as I find some alternative;

Relevant commits: 
dfe061130b@upstream [UI] Cropping avatar as a circle, proper preview done
